Errors: When scripts go bad

Not all attempts at customizing Format-type property values may be successful—if a syntax error causes the script to fail, an “ERROR” or “err:<item>” appears in the produced text.

For example:

If you forget a “%” on BoundLabel Text entry, say: Fan is %out.value

The text displayed is: “ERROR Fan is %out.value”
Or, a script call to a misnamed slot might fail with a displayed error similar to: ChwPump2 had %err:control:DiscreteTotalizerExt:changeOfStates% COS since last reset.

It is recommended that you test all modifications of BFormat-type properties, to make sure you get the intended results.